Unless Hawkman has some super powerful move up his sleeve, Namor kills him in one punch. Namor has speed, strength and durability levels WAY above Hawkman.
suited for high water pressure
Super strength, high speed swimming, atmospheric flight, command of marine life. Limited ability to absorb and project electric energy.
He has been shown with the ability to mimic physical traits of sea creatures.
meaning he can absurb some of his electric from his macs and use it back at him
Hawkman cant touch that
Depends if he has Claw of Horus or not. It's probably not part of his normal arsenal. Namor could have Sword of Kamuu or Trident of Neptune (except that Trident is pretty much something he carries often).